Review Python BASICS (5)

This series of blogs takes notes from learn python the hard way.

1. Because the five chapters to be viewed today is a review of the nature of the content, the content in the front is integrated, so there is no new content

OnlyCodePaste it here

View code

 Print   "  Let's practice everything.  "  Print   "  You \ 'd need to know \ 'bout escapes with \ that do \ n newlines and \ t tabs.  "  Poem = """ \ T the lovely wordwith logic so firmly plantedcannot discern \ n the needs of lovenor comprehend passion from intuitionand requires an explanation \ n \ t \ twhere there is none.  """  Print   "  -------------------  "  Print  Poem  Print   "  -------------------  "  Five = 10-2 + 3-6 Print  "  This shoshould be five: % s  " % Five  Def  Secret_formula (started): jelly_beans = Started * 500 Jars = Jelly_beans/1000 Crates = Jar S/100 Return  Jelly_beans, jars, cratesstart_point = 10000 Beans, jars, crates = Secret_formula (start_point) Print   "  With a starting point of: % d  " % Start_point  Print   "  We 'd have % d beans, % d jars, and % d crates.  " % (Beans, jars, crates) start_point = Start_point/10 Print   "  We can also do that this way:  " Print   "  We 'd have % d beans, % d jars, and % d crates.  " % Secret_formula (start_point)

Output

View code

E: \ SkyDrive \ Python \ the hard way to learn Python> Python ex24.pylet  '  S practice everything. You '  D need to know  '  Bout escapes with \ that do newlines  And Tabs. ------------------- The lovely wordwith logic so firmly plantedcannot discern the needs of lovenor comprehend passion  From  Intuition  And  Requires an explanation where there  Is  None. ------------------- This shoshould be five: 5 With a starting point: 10000 We  ' D have 5000000 beans, 5000 jars, and 50 crates.  We can also do that this way: we  '  D have 500000 beans, 500 jars, and 5 crates. 

 

2. Put your own functions in a file, and then import the file to use these functions in the code.

Put the function in the ex25.py file.

View code

 Def  Break_words (stuff ):  """  This function will break up words for us.  """  Words = Stuff. Split ("   "  )  Return  Words  Def  Sort_words (words ):  """  Sorts the words.  """      Return  Sorted (words)  Def  Print_first_word (words ):  """  Prints the first word after popping it off. """  Word = Words. Pop (0)  Print  Word  Def  Print_last_word (words ):  """  Prints the last word after popping it off.  """  Word = Words. Pop (-1 )  Print  Word  Def Sort_sentence (sentence ):  """  Takes in a full sentence and returns the sorted words.  """  Words = Break_words (sentence)  Return  Sort_words (words)  Def  Print_first_and_last (sentence ):  """  Prints the first and last words of the sentence.  """  Words =Break_words (sentence) print_first_word (words) print_last_word (words)  Def  Print_first_and_last_sorted (sentence ):  """  Sorts the words then prints the first and last one.  """  Words = Sort_sentence (sentence) print_first_word (words) print_last_word (words) 

Run the following command in the python command line:

E: \ SkyDrive \ Python \ the hard way to learn Python> Python ex25.pye: \ SkyDrive \ Python \ the hard way to learn Python > Pythonpython 2.7 . 3 (Default, APR 10   2012 , 23 : 24 : 47 ) [MSC v. 1500   64  Bit (amd64)] on win  32  Type  "  Help  " ,"  Copyright  " , "  Credits  " Or "  License  "   For   More  Information. >>> Import ex25 >>> Sentence = "  All good things come to those who wait. " >>> Words = Ex25.break _ words (sentence) # Use the functions in ex25. If it is too troublesome, you can start from ex25 import *, so that this line can write words = break_words (sentence) >>> Words [  '  All  ' , '  Good  ' , '  Things  ' , '  Come ' , '  To  ' , '  Those  ' , '  Who  ' , '  Wait.  '  ] >>> Sorted_words = Ex25.sort _ words (words) >>>Sorted_words [  '  All  ' , '  Come  ' , '  Good  ' , '  Things  ' , '  Those  ' ,'  To  ' , '  Wait.  ' , '  Who  '  ] >>> Ex25.print _ first_word (words) All >>> Ex25.print _ last_word (words)  Wait  . >>> Wrodstraceback (most recent call Last  ): File  "  <Stdin>  " , Line 1 , In <Module> Nameerror: Name  '  Wrods  '  Is Not Defined >>> Words [  '  Good  ' , '  Things  ' , '  Come  ' , '  To  ' , '  Those  ' , '  Who  '  ] >>>Ex25.print _ first_word (sorted_words) All >>> Ex25.print _ last_word (sorted_words)  Who >>> Sorted_words [  '  Come  ' , '  Good  ' , '  Things  ' , '  Those ' , '  To  ' , '  Wait.  '  ] >>> Sorted_words = Ex25.sort _ sentence (sentence) >>> Sorted_words [  '  All  ' , '  Come ' , '  Good  ' , '  Things  ' , '  Those  ' , '  To  ' , '  Wait.  ' ,'  Who  '  ] >>> Ex25.print _ first_and_last (sentence) All  Wait .

Two important points are worth noting.

• The difference between import ex25 and from ex25 import * is that the call function ex25.break _ words (sentence) and the direct call of break_words (sentence)
• List can pop any location